package com.tjetc.service.impl;

import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.tjetc.common.JsonResult;
import com.tjetc.dao.PostInfoMapper;
import com.tjetc.entity.PostInfo;
import com.tjetc.service.PostInfoService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
@Service
public class PostInfoServiceImpl implements PostInfoService {
    @Autowired
    private PostInfoMapper postInfoMapper;
    @Override
    public JsonResult findById(Long id) {
        //selectById是mybatisplus提供的单表查询操作，生成sql语句都是mybatisplus内置
        PostInfo postInfo=postInfoMapper.selectById(id);
        return JsonResult.success(postInfo);
    }
    @Override
    public JsonResult findPage(String name, Integer pageNo, Integer pageSize) {
        //设置页码和每页数量
        Page<PostInfo> page=Page.of(pageNo,pageSize);
        //把adminPage传入mapper查询中，adminPage就是最后的分页结果
        Page<PostInfo>postInfoPage= postInfoMapper.selectPageLikeName(page,name);
        //convert方法转换Page中 records集合元素类型 Admin---->AdminView
        //new Function<Admin,AdminView>(){};表示创建一个实现Function的匿名类 对象
        return JsonResult.success(postInfoPage);
    }
    @Override
    public JsonResult deleteById(Long id) {
        int rows=postInfoMapper.deleteById(id);
        if (rows>0){
            return JsonResult.success("删除成功");
        }
        else {
            return JsonResult.fail("删除失败");
        }
    }
    //@Transactional用在service方法上，保证事务
    //注意：默认情况@Transactional只对运行时异常起作用(RuntimeException)
    @Transactional
    @Override
    public JsonResult save(PostInfo postInfoParam) {
        PostInfo postInfo=null;
        LocalDateTime now=LocalDateTime.now();
        //通过判断id值有无判断是新增还是更新，id值无是新增，id值有就是更新
        if(postInfoParam.getPositionId()==null||postInfoParam.getPositionId()<=0){
            //新增
            postInfo=new PostInfo();
            BeanUtils.copyProperties(postInfoParam,postInfo);
            postInfo.setCreateTime(now);
            postInfo.setUpdateTime(now);
            postInfoMapper.insert(postInfo);
            return JsonResult.success("新增成功",null);
        }else{
            //更新
            //根据id查询Admin信息
            postInfo=postInfoMapper.selectById(postInfoParam.getPositionId());
            if(postInfo==null){
                return JsonResult.fail("用户不存在，更新失败");
            }
            //要更新的字段
            postInfo.setName(postInfoParam.getName());
            postInfo.setUpdateTime(now);
            postInfo.setBaseSalary(postInfoParam.getBaseSalary());
            postInfo.setDescription(postInfoParam.getDescription());
            postInfo.setIsDeleted(postInfoParam.getIsDeleted());
            postInfo.setStatus(postInfoParam.getStatus());
            postInfo.setRequirements(postInfoParam.getRequirements());
            int rows=postInfoMapper.updateById(postInfo);
            if (rows>0){
                return JsonResult.success("更新成功",null);
            }else {
                return JsonResult.fail("用户不存在，更新失败");
            }
        }
    }
}
